Windows* to Linux* Options Cross-reference

This section provides cross-reference table of the Intel® Fortran Compiler options used on the Windows* and Linux* operating systems. The options described can be used for compilations targeted to either IA-32 or Itanium®-based applications or both. See Conventions Used in the Options Quick Guide Tables.

Options specific to IA-32 architecture
Options specific to the Itanium® architecture
All other options are available for both IA-32 and Itanium architectures.

Note
The table is based on the alphabetical order of compiler options for Linux, second column.

Note
The value in the Default column is used for both Windows and Linux operating systems unless indicated otherwise.

For more details on each of these options refer to the Intel® Fortran Compiler User's Guide, Volumes I and II, and the Intel® Fortran Compiler Manpages.

Windows Option	Linux Option	Description	Default
/1	-1	Executes at least one iteration of DO loops (same as the -onetrip option). This option has the same effect as -f66 or -66 .	OFF
/4L{72\|80\|132}	-72, -80, -132	Treats the statement ﬁeld of each ﬁxed-form source line as ending in column 72 (the default), 80, or 132 (same as the -extend_source option).	/4L72 -72
/align:keyword	-align keyword	Tells the compiler to align data items by adding padding bytes (same as the -align all option) as indicated by a keyword: all, none, [no]commons, dcommons, [no]recnbytes (n=1, 2, 4, 8, 16), [no]records, [no]sequence See Intel® Fortran Compiler Manpages for more details.	-align nocommons -align records -align nosequence -align rec8bytes
/Qansi_alias[-]	-ansi_alias	Tells the compiler to assume that the program adheres to the Fortran 95 Standard type aliasability rules.	-ansi_alias-
None	-arch keyword IA-32 only	Determines the version of the architecture for which the compiler generates instructions. keyword: pn1 Optimizes for the Intel® Pentium® processor. pn2 Optimizes for the Intel® Pentium® Pro, Intel® Pentium® II, and Intel® Pentium® III processors. pn3 This is the same as specifying the -arch pn2 option. pn4 optimizes for the Intel® Pentium® 4 processor.	-arch pn4
/assume:bscc	/assume bscc	Tells the compiler to treat the backslash character (\) as a C-style control (escape) character syntax in character literals. The default is -assume nobscc, which tells the compiler to treat the backslash character as a normal character instead of a control character in character literals.	-assume nobscc
/assume:keyword	-assume keyword	Specifies that assumptions are made by the optimizer and code generator according to the indicated keyword: none, [no]accuracy_sensitive, [no]bscc, [no]byterecl, [no]buffered_io, [no]dummy_aliases, [no]protect_constants, [no]source_include, [no]underscore. See Intel® Fortran Compiler Manpages for details.	-assume none
/assume:cc_omp	-assume cc_omp	Enables conditional compilation as defined by the OpenMP Fortran API. -openmp enables this option: sets -assume cc_omp.	-assume cc_omp with -openmp specified
/assume:minus0	-assume minus0	Tells the compiler to use Fortran 95 standard semantics for the treatment of IEEE* floating value -0.0 in the SIGN intrinsic, if the processor is capable of distinguishing the difference between -0.0 and +0.0, and to write a value of -0.0 with a negative sign on formatted output. The default is -assume nominus0, which tells the compiler to use Fortran 90/77 standard semantics in the SIGN intrinsic to treat -0.0 and +0.0 as 0.0, and to write a value of -0.0 with no sign on formatted output.	OFF (-assume nominus0)
/Qauto	-auto	Places variables, except those declared as SAVE, on the runtime stack (same as -automatic or -nosave.	-auto_scalar or: if you specify -recursive or -openmp, the default is -auto
/Qauto_ilp32 Itanium-based systems	-auto_ilp32 Itanium-based systems	Specifies that the application cannot exceed a 32-bit address space, which allows the compiler to use 32-bit pointers whenever possible. To use this option, you must also specify -ipo. Using the -auto_ilp32 option on programs that can exceed 32-bit address space (2**32) may cause unpredictable results during program execution.	OFF
/Qauto_scalar	-auto_scalar	Makes AUTOMATIC all scalar local variables of intrinsic type INTEGER, REAL, COMPLEX, or LOGICAL. You cannot specify -save, -auto or -automatic with this option.	OFF
/Qautodouble	-autodouble	Deﬁnes real variables to be REAL(KIND=8).This option is the same as specifying -r8.	OFF
/automatic	-automatic	Places variables, except those declared as SAVE, on the runtime stack (same as -auto or -nosave). The default is -auto_scalar. However, if you specify recursive or -openmp, the default is -auto.	-auto_scalar or: if you specify -recursive or -openmp, the default is -auto.
/Qax{K\|W\|N\|B\|P} IA-32 only	-ax{K\|W\|N\|B\|P} IA-32 only	Generates processor-specific code corresponding to one of codes: K - Intel® Pentium® III processors and compatible Intel processors. W - Intel Pentium 4 processors and compatible Intel processors. The new codes: these options enable new optimizations in addition to Intel processor-specific optimizations. (new) N - Intel Pentium 4 processors and compatible Intel processors. (new) B - Intel® Pentium® M and compatible Intel processors. (new) P - Intel processors code-named "Prescott" and compatible Intel processors.	OFF
None	-Bdynamic	Enables dynamic linking of libraries at runtime. Smaller executables are created than with static linking.	OFF
/[no]browser	None	Specifies that source browser information should be (or not) generated in the indicated file if present.	OFF (-nobrowser)
None	-Bstatic	Enables static linking of a user's library.	OFF
/c	-c	Causes the compiler to compile to an object (.o) ﬁle only and not link.	OFF
/CB	-CB	Performs runtime checks on whether array subscript and substring references are within declared bounds. Same as -check bounds.	OFF
/ccdefault: keyword	-ccdefault keyword	Specifies the type of carriage control used for units 6 and *; keyword = default, fortran, list, or none.	-ccdefault default can be affected by the -vms option, see manpages
/check: keyword	-check keyword	Checks runtime conditions, according to the keyword: all, none, [no]arg_temp_created, [no]bounds, [no]format, [no]output_conversion	OFF (-nocheck or (-check none)
/cm	-cm	Suppresses all messages about questionable programming practices (same as the -warn nousage option).	OFF
/Qcommon_args	-common_args	Tells the compiler that dummy (formal) arguments to procedures share memory locations with other dummy arguments or with COMMON variables that are assigned. This is the same as specifying -assume dummy_aliases.	OFF
/Qcomplex_ limited_range[-]	-complex_ limited _range[-]	Enables the use of basic algebraic expansions of some arithmetic operations involving data of type COMPLEX. This can cause some performance improvements in programs that use a lot of COMPLEX arithmetic, but values at the extremes of the exponent range may not compute correctly.	OFF (-complex_ limited_ range-, option disabled)
/convert:keyword	-convert keyword	Specifies the format of unformatted files containing numeric data indicated in a keyword: big_endian, cray, fdx, fgx, ibm, little_endian, native, vaxd, vaxg. See Intel® Fortran Compiler Manpages for more details.	OFF
/Qcpp	-cpp	Runs the Fortran preprocessor on source ﬁles prior to compilation (same as the -fpp option).	OFF
/Dname /Dname[=value]	-Dname -Dname[=value]	Deﬁnes the name as a definition to use with conditional compilation directives or the Fortran preprocessor (-fpp). The value can be an integer or it can be a character string delimited by double quotes; for example, -Dname="string". If no definition is given, the <name > is deﬁned as "1".	OFF
/d_lines	-d_lines	Compiles debug statements (indicated by D in column 1); this is the same as specifying -DD.	-nod_lines
/Qd_lines	-DD	Compiles debugging statements indicated by the letter D in column 1 of the source code; this is the same as specifying -d_lines.	OFF
/double_size:size	-double_size size	Defines the size of DOUBLE PRECISION and DOUBLE COMPLEX declarations, constants, functions, and intrinsics. The size can be 64 (default) or 128.	-double_ size 64
/Qdps[-]	-dps	Enable (default) or disable DEC* parameter statement recognition.	ON
/Bz	-dryrun	Speciﬁes that driver tool commands should be shown but not executed.	OFF
None	-dynamic-linker(file)	Speci ﬁes a dynamic linker in file other than the default.	OFF
/Qdyncom:A,B,C	-dyncom "a,b,c"	Enables dynamic allocation of the speciﬁed COMMON blocks at run time. The quotes are required.	OFF
/E	-E	Causes the Fortran preprocessor to send output to stdout.	OFF
/4{Y\|N}s	-e90, -e95	Causes the compiler to issue errors instead of warnings for nonstandard Fortran 90 (-e90) or Fortran 95 (-e95). No such errors or warnings are issued by default.	OFF (/4Ns)
/EP	-EP	Causes the Fortran preprocessor to send output to stdout,omitting #line directives.	OFF
/[no]error_ limit:num	-[no]error_ limit num	Specifies the maximum number of error-level or fatal-level compiler errors allowed for a ﬁle speciﬁed on the command line. A maximum of 30 error-level and fatal-level messages are allowed before the compiler stops the compilation.	-error_ limit 30
/Qextend_source: [size]	-extend_source [size]	Speciﬁes the column number to use to end the statement field in ﬁxed-form source files. size can be 72, 80, or 132. The default behavior is -noextend_source, which implies column 72. If you specify -extend_source with no size, the default is -extend_source 132. Specifying -extend_source sets the -fixed option.	-noextend_ source
/F	-F	Causes the Fortran preprocessor to send output to a ﬁle (same as the -preprocess_only and -P options). To use this option, you must also specify -fpp.	OFF
/f66 or -66	-f66 or -66	Enforces FORTRAN-66 semantics.	OFF
/f77rtl	-f77rtl	Tells the compiler to use the runtime behavior of FORTRAN 77 instead of Intel® Fortran. This affects some INQUIRE speciﬁers when the unit is not connected to a ﬁle, PAD= defaults to 'NO’ for formatted input, NAMELIST input format is different, and NAMELIST and list-directed input of character strings must be delimited by apostrophes or quotes.	OFF (-nof77rtl)
/fast	-fast	Enhances speed across the entire program. Sets the following command options that can improve runtime performance: -O3, -ipo, and -static.	OFF
/FAc	-fcode-asm	Produces an assembly ﬁle with optional code annotations. To use this option, you must also specify -S.	OFF
None	-fcommon	Tells the compiler to treat common symbols as global deﬁnitions and to allocate memory for each symbol at compile time. This may permit the compiler to use the more efficient GP-relative addressing mode when accessing the symbol.	OFF (-fno-common)
/FI	-FI	Speciﬁes source ﬁles are in ﬁxed format (same as the -fixed option).	Based on file extension
/fixed	-fixed	Speciﬁes source ﬁles are in ﬁxed format. By default, source ﬁle format is determined by the ﬁle sufﬁx.	Based on file extension
None	-fminshared	Tells the compiler to treat a compilation unit as a component of a main program and not to link it as a shareable object. Implies -fvisibility=protected	OFF
/Oa[-]	-fno-alias	Speciﬁes that aliasing should not be assumed in the program.	-falias /Oa
/Ow[-]	-fno-fnalias	Speciﬁes that aliasing should not be assumed within functions, but should be assumed across calls.	-ffnalias /Ow
/Qfnsplit	-fnsplit- Itanium-based systems	Enables function splitting (enabled with -prof_use). The default is -fnsplit-, which disables the splitting within a routine but leaves function grouping enabled.	-fnsplit-
/Oy- IA-32 only	-fp IA-32 only	Disables using EBP as a general purpose register so it can be used as a stack frame printer.	OFF
/Qfp_port	-fp_port IA-32 only	Rounds floating-point results after floating-point operations, so rounding to user-declared precision happens at assignments and type conversions; this has some impact on speed. The default is to keep results of floating-point operations in higher precision; this provides better performance but less consistent floating-point results.	OFF
/fpconstant	-fpconstant	Tells the compiler to extend the precision to double precision for single-precision constants assigned to double-precision variables.	-nofpconstant
/fpe:n	-fpen	Specifies floating-point exception handling at run time for the main program, n=0, 1, 3. -fpe0 - floating underflow results in zero; all other floating-point exceptions abort execution; -fpe1 - floating underflow results in zero; all other floating-point exceptions produce exceptional values (signed Infinities or NaNs) and execution continues; -fpe3 - all floating-point exceptions produce exceptional values (signed infinities, denormals, or NaNs) and execution continues; this is the default. Also see -ftz.	/fpe:3 -fpe3
None	-fpic, -fPIC	Generates position-independent code. Can also be specified as -fPIC.	OFF
/Qfpp:n	-fpp n	Runs the Fortran preprocessor on source ﬁles prior to compilation. n=0: disables CVF and # directives (equivalent to -nofpp). n=1: enables CVF conditional compilation and # directives; when Fortran preprocessor is invoked, -fpp1 is the default n=2: enables only # directives; n=3: enables only CVF conditional compilation directives.	OFF
/fpscomp [:keyword]	-fpscomp [keyword]	Speciﬁes a level of compatibility with Microsoft* Fortran PowerStation as indicated by a keyword: all, none, [no]filesfromcmd, [no]general, [no]ioformat, [no]libs, [no]logicals.	For all and nolibs: -fpscomp libs For the rest: -fpscomp none
/Qfpstkchk IA-32 only	-fpstkchk IA-32 only	Generates extra code after every function call to assure that the FP (ﬂoating-point) stack is in the expected state. By default, there is no checking. So when the FP stack overﬂows, NaN value is put into FP calculations, and the program’s results differ. Unfortunately, the overﬂow point can be far away from the point of the actual bug. The -fpstkchk option places code that would access-violate immediately after an incorrect call occurred, thus making it easier to locate these issues.	OFF
/FR	-FR	Speciﬁes source ﬁles are in free format (same as the -free option).	Based on source file extension
None	-fr32 Itanium compiler	Disables use of high ﬂoating-point registers. Uses only the lower 32 floating-point registers.	OFF
/free	-free	Speciﬁes source ﬁles are in free format. By default, source ﬁle format is determined by the file sufﬁx.	Based on source file extension
/FAs	-fsource-asm	Produces an assembly ﬁle with optional code annotations. To use this option, you must also specify -S.	OFF
/Qftz[-]	-ftz[-]	Enables (or disables: -ftz-) floating underflow results set to zero. For Itanium-based systems only: option -O3 sets -ftz on.	-ftz-
None	-fverbose-asm	Produces an assembly ﬁle with compiler comments, including options and version information. To use this option, you must also specify -S, which sets -fverbose-asm. If you do not want this default when you specify -S, specify -fnoverbose-asm.	-fnoverbose-asm
None	-fvisibility= keyword -fvisibility- keyword=file	The ﬁrst form speciﬁes the default visibility for global symbols using one of the five command line options corresponding to the keyword: external, default, protected, hidden, and internal. The second form speciﬁes the visibility for symbols that are in a ﬁle (this form overrides the ﬁrst form). The file is the pathname of a file containing the list of symbols whose visibility you want to set; the symbols are separated by whitespace (spaces, tabs, or newlines). See Intel® Fortran Compiler Manpages for more details.	OFF
None	-fwritable-strings	Specifies that string literals should be placed in a writable data section. This option is used for compatibility with old programs that write into string literals.	OFF
/Zi, /Z7	-g	Produces symbolic debug information in the object file. The compiler does not support the generation of debugging information in assemblable ﬁles. If you specify the -g option, the resulting object ﬁle will contain debugging information, but the assemblable ﬁle will not. On IA-32 systems, specifying the -g or -O0 option automatically enables the -fp option.	OFF
/help	-help	Prints the list of compiler options.	OFF
/Idir	-Idir	Speciﬁes a directory to add to the include path, which is used to search for module ﬁles (USE statement) and include ﬁles (INCLUDE statement).	OFF
None	-i_dynamic	Links Intel-provided libraries dynamically.	OFF
/4I{2\|4\|8}	-i{2\|4\|8}	Defines the default KIND for integer variables and constants to be 2, 4, and 8 bytes (same as -integer_size {16\|32\|64} )	/4I4 -i4
/4{Y\|N}d	-implicitnone	Sets the default type of a variable to undeﬁned (IMPLICIT NONE). Same as the -u option.	OFF
/Qinline_ debug_info	-inline _debug_info	Preserves the source position of inlined code instead of assigning the call-site source position to inlined code.	OFF
/intconstant	-intconstant	Tells the compiler to use FORTRAN 77 semantics, rather than Fortran 95/90 semantics, to determine the KIND for integer constants.	OFF
/integer_size: size	-iteger_size size	Deﬁnes the size of INTEGER and LOGICAL variables. The size can be 16, 32, or 64.	-integer_ size 32
/Qip	-ip	Enables single-ﬁle interprocedural optimizations.	OFF
/Qip_no _inlining	-ip_no_inlining	Disables full and partial inlining enabled by -i8. To use this option, you must specify -ip or -ipo.	OFF
/Qip_no _pinlining IA-32 only	-ip_no _pinlining IA-32 only	Disables partial inlining. To use this option, you must specify -ip or -ipo.	OFF
/QIPF_fltacc[-] Itanium-based systems	-IPF_fltacc[-] Itanium-based systems	Disables optimizations that affect floating-point accuracy. If the default setting is used (-IPF_fltacc-), the compiler may apply optimizations that reduce ﬂoating−point accuracy. You can use -IPF_fltacc or -mp to improve ﬂoating-point accuracy, but at the cost of disabling some optimizations.	-IPF_fltacc-
/QIPF_flt_eval _method0 Itanium-based systems	-IPF_flt_eval _method0 Itanium-based systems	Directs the compiler to evaluate the expressions involving ﬂoating-point operands in the precision indicated by the variable types declared in the program. By default, intermediate floating-point expressions are maintained in higher precision.	OFF
/QIPF_fma[-] Itanium-based systems	-IPF_fma Itanium-based systems	Enables the combining of ﬂoating-point multiplies and add/subtract operations. Also enables the contraction of floating-point multiply and add/subtract operations into a single operation. The compiler contracts these operations whenever possible. However, if -mp is speciﬁed, these contractions are disabled.	-IPF_fma-
/QIPF_fp _speculationmode Itanium-based systems	-IPF_fp_ speculationmode Itanium-based systems	Enables ﬂoating-point speculations with one of the following mode conditions: fast −Speculate ﬂoating-point operations. off −Disables speculation of ﬂoating-point operations. safe −Speculate only when safe. strict −This is the same as specifying off.	-IPF_fp_ speculation fast
/Qipo	-ipo	Enables mult ﬁle IP optimizations (between ﬁles). When you specify this option, the compiler performs inline function expansion for calls to functions deﬁned in separate ﬁles. For this reason, it is important to compile the entire application or multiple, related source ﬁles together when you specify -ipo.	OFF
/Qipo_c	-ipo_c	Generates a multiﬁle object file (ipo_out.o) that can be used in further link steps.	OFF
/Qipo_obj	-ipo_obj	Forces the generation of real object files. Requires -ipo.	IA-32: OFF Itanium Compiler: ON
/Qipo_S	-ipo_S	Generates a multi ﬁle assembly ﬁle (ipo_out.s) that can be used in further link steps.	OFF
/Qivdep_parallel Itanium-based systems	-ivdep_parallel Itanium-based systems	Tells the compiler that there is no loop-carried memory dependency in any loop following an IVDEP directive.	OFF
None	-Kpic	This is a deprecated option; it can also be speciﬁed as -KPIC. Use -fpic instead.	OFF
None	-Ldir	Tells the linker to search for libraries in dir before searching the standard directories.	OFF
/libdir:all	-[no]libdir [keyword]	Controls the library names that should be emitted into the object file as indicated in a keyword: all, [no]automatic, [no]user.	-libdir all
None	-lname	Links with the library indicated in name.	OFF
/Qlowercase	-lowercase	Causes the compiler to ignore case differences in identiﬁers and to convert external names to lowercase (same as the -names lowercase option). This is the default.	Windows: OFF Linux: ON
/iface:mixed_ str_len_arg	-mixed_ str_len_arg	Tells the compiler that the hidden length passed for a character argument is to be placed immediately after its corresponding character argument in the argument list. The default (-nomixed_str_len_arg) places the hidden lengths in sequential order at the end of the argument list.	OFF
/Fmfilename	None	Instructs the linker to produce a map file.	OFF
/module:dir	-module dir	Speciﬁes the directory dir where module (.mod) ﬁles should be placed when created and where they should be searched for (USE statement).	OFF
/Op[-]	-mp	Maintains ﬂoating-point precision (while disabling some optimizations). Restricts optimization to maintain declared precision and to ensure that floating-point arithmetic conforms more closely to the ANSI* and IEEE standards. For most programs, specifying this option adversely affects performance. If you are not sure whether your application needs this option, try compiling and running your program both with and without it to evaluate the effects on both performance and precision.	OFF
/Qprec IA-32 compiler	-mp1 IA-32 compiler	Improves ﬂoating-point precision. This option disables fewer optimizations and has less impact on performance than -mp.	OFF
/names:keyword	-names keyword	Specifies how source code identifiers and external names are interpreted as indicated by a keyword: as_is, lowercase, uppercase	OFF
/nbs	-nbs	Tells the compiler to treat a backslash as a normal character, not an escape character (same as the -assume nobscc option).	OFF
None	-no_cpprt	Prevents linking of the C++ runtime libraries.	OFF
/align:none	-noalign	Prevents the alignment of data items. This is the same as specifying -align none.	-align
/noaltparam	-noaltparam	Speci ﬁes that the alternate form of parameter constant declarations (without parenthesis) should not be recognized (same as the -nodps option).This form has no parentheses surrounding the list, and the form of the constant, rather than implicit or explicit typing, determines the data type of the variable.	-altparam
/Qnobss_init	-nobss_init	Places any variables that are explicitly initialized with zeros in the DATA section. By default, variables explicitly initialized with zeros are placed in the BSS section.	OFF
None	-nodefaultlibs	Prevents the compiler from using standard libraries when linking.	OFF
/nodefine	-nodefine	Specifies that all preprocessor definitions apply only to -fpp and not to Intel Fortran conditional compilation directives.	OFF
/Qdps-	-nodps	Speciﬁes that the alternate form of parameter constant declarations (without parenthesis) should not be recognized (same as the -noaltparam option).	-dps
None	-nofor_main	Speciﬁes the main program is not written in Fortran, and prevents the compiler from linking for_main.o into applications.	OFF
/noinclude	-noinclude	Prevents the compiler from searching in /usr/include for ﬁles speciﬁed in an INCLUDE statement. You can specify the -Idir option along with this option. This option does not affect cpp(1) behavior, and is not related to the Fortran 95 and 90 USE statement.	ON
/Oi-	-nolib_inline	Disables inline expansion of intrinsic functions.	ON
/nologo	-nologo	Suppresses compiler version information.	OFF
None	-nostartfiles	Prevents the compiler from using standard startup files when linking.	OFF
None	-nostdinc	Remove standard directories from include file search path (same as the -X option.)	OFF
None	-nostdlib	Prevents the compiler from using standard libraries and startup ﬁles when linking.	OFF
None	-nus	Disables appending an underscore to external subroutine names.	OFF
/Fafile /Fofile /Fefile	-ofile	Speci ﬁes the name for an output file.	OFF
/Od	-O0	Disables -On optimizations. On IA-32 systems, this option sets the -fp option.	OFF
/O1	-O1	On IA-32 systems,enables optimizations for speed. Also disables intrinsic recognition and the -fp option. This option is the same as the -O2 option. On Itanium(R)-based systems, enables optimizations for server applications (straight-line and branch-like code with ﬂat proﬁle). Enables optimizations for speed,while being aware of code size.For example, this option disables software pipelining and loop unrolling.	OFF
/O2	-O2, -O	This option is the default for optimizations. However,if -g is specied, the default is -O0. On IA-32 systems, this option is the same as the -O1 option. On Itanium-based systems, enables optimizations for speed, including global code scheduling, software pipelining, predication, and speculation. On these systems, the -O2 option enables inlining of intrinsics. It also enables the following capabilities for performance gain: constant propagation, copy propagation, dead-code elimination, global register allocation, global instruction scheduling and control speculation, loop unrolling, optimized code selection, partial redundancy elimination, strength reduction/induction variable simplification, variable renaming, exception handling optimizations, tail recursions, peephole optimizations, structure assignment lowering and optimizations, and dead store elimination.	ON
/O3	-O3	Enables -O2 optimizations plus more aggressive optimizations, such as prefetching, scalar replacement, and loop transformations. Enables optimizations for maximum speed, but does not guarantee higher performance unless loop and memory access transformation take place. On IA-32 systems, when the -O3 option is used with the -ax and -x options, it causes the compiler to perform more aggressive data dependency analysis than for -O2, which may result in longer compilation times. On Itanium-based systems, enables optimizations for technical computing applications (loop-intensive code): loop optimizations and data prefetch.	OFF
/Ob{0\|1\|2}	-Ob{0\|1\|2}	Controls inline expansion. The amount of inline expansion performed varies as follows: -Ob0: disable inlining; however, statement functions are always inlined. -Ob1: Enables inlining of routines.This is the default. -Ob2: enables inlining of any routine, at the compiler ’s discretion. Enables interprocedural optimizations (has the same effect as the -ip option).	-Ob1
/Qonetrip	-onetrip	Executes at least one iteration of DO loops (same as the -1 option). This option has the same effect as -f66 or -66.	OFF
/Qopenmp	-openmp	Enables the parallelizer to generate multithreaded code based on OpenMP* directives. The code can be executed in parallel on both uniprocessor and multiprocessor systems. The -openmp option works with both -O0 (no optimization) and any optimization level of -On. Specifying -O0 with -openmp helps to debug OpenMP applications.	OFF
/Qopenmp _report{0\|1\|2}	-openmp _report{0\|1\|2}	Controls the OpenMP parallelizer ’s level of diagnostic messages. 0 − Displays no diagnostic information. 1 − Displays diagnostics indicating loops, regions, and sections successfully parallelized. 2 − Displays the diagnostics speciﬁed by -openmp_report1 plus diagnostics indicating MASTER constructs, SINGLE constructs, CRITICAL constructs, ORDERED constructs, ATOMIC directives, etc., successfully handled.	-openmp _report1
/Qopenmp_stubs	-openmp_stubs	Enables the compiler to generate sequential code. The OpenMP directives are ignored and a stub OpenMP library is linked.	OFF
/Qopt_report	-opt_report	Generates an optimization report and directs to stderr unless -opt_report_file is specified.	OFF
/Qopt_report _filefilename	-opt_report _filefilename	Specifies the filename to hold the optimizations report.	OFF
/Qopt_report _help	-opt_report _help	Lists the logical names of optimizers available for report generation (for -opt_report_phase).	OFF
/Qopt _report_level {min\|med\|max}	-opt _report_level {min\|med\|max}	Specifies the detail level of the optimizations report.	-opt_report -levelmin
/Qopt_report _phasephase	-opt_report _phasephase	Speciﬁes the phase against which reports are generated. The compiler generates reports for the optimizer you specify in phase. This option can be used multiple times on the same command line to generate reports for multiple optimizers. Currently, the following optimizer reports are supported: ipo − Interprocedural Optimizer hlo − High Level Optimizer ilo − Intermediate Language Scalar Optimizer ecg − Code Generator omp − Open MP all − All phases When one of the above logical names for optimizers is speciﬁed for phase, all reports from that optimizer are generated.	OFF
/Qopt_report _routine [substring]	-opt_report_ routine [substring]	Generates a report on the routines containing the speci ﬁed substring . If substring is not speciﬁed, reports from all routines are generated.	OFF
None	-p	Compiles and links for function proﬁling with gprof (1). This is the same as specifying -pg or -qp .	OFF
/P	-P	Causes the Fortran preprocessor to send output to a ﬁle (same as the -preprocess_only and -F options). To use this option, you must also specify -fpp.	OFF
/Qpad[-]	-pad	Enables the changing of the variable and array memory layout.	OFF (-nopad)
/Qpad_source	-pad_source	Speciﬁes that ﬁxed-form source records shorter than the statement ﬁeld width are to be padded with spaces (on the right) to the end of the statement ﬁeld. This affects the interpretation of character and Hollerith literals that are continued across source records.	OFF
/Qpar_ report{0\|1\|2\|3}	-par_ report{0\|1\|2\|3}	Controls the auto-parallelizer diagnostic messages. 0 − Displays no diagnostic information. 1 − Displays diagnostics indicating loops successfully auto-parallelized. This is the default. Issues a "LOOP AUTO-PARALLELIZED" message for parallel loops. 2 − Displays diagnostics indicating loops successfully auto-parallelized, as well as unsuccessful loops. 3 −Displays the diagnostics speciﬁed by -par_report2 plus additional information about any proven or assumed dependencies inhibiting auto-parallelization (reasons for not parallelizing).	-par _report1
/Qpar _threshold{n}	-par _threshold{n}	Sets a threshold for the auto-parallelization of loops based on the probability of profitable execution of the loop in parallel. This option is used for loops whose computation work volume cannot be determined at compile-time. The threshold is usually relevant when the loop trip count is unknown at compile-time. n=0 to 100. The compiler applies a heuristic that tries to balance the overhead of creating multiple threads versus the amount of work available to be shared amongst the threads.	n=100
/Qparallel	-parallel	Enables the auto-parallelizer to generate multithreaded code for loops that can be safely executed in parallel. To use this option, you must also specify -O2 or -O3.	OFF
/Qpc{32\|64\|80} IA-32 only	-pc32 -pc64 -pc80 IA-32 only	Enables floating-point significand precision control as follows: -pc32 to 24-bit significand -pc64 to 53-bit significand -pc80 to 64-bit significand See Intel® Fortran Compiler Manpages for more details.	/Qpc64 -pc64
/[no]pdbfile: [file]	None	Specifies that any debug-related information should (or should not) be generated to a program database file.	OFF (-nopdbfile)
None	-pg	Compile and link for function profiling with gprof(1). This is the same as specifying -p or -qp.	OFF
/Qprec_div IA-32 only	-prec_div IA-32 only	Disables floating point division-to-multiplication optimization resulting in more accurate division results. Slight speed impact.	OFF
/Qprefetch[-] IA-32 only	-prefetch[-] IA-32 only	Enables or disables prefetch insertion (requires -O3).	OFF
None	-preprocess _only	Causes the Fortran preprocessor to send output to a ﬁle (same as the -F and -P options). To use this option, you must also specify -fpp.	OFF
/Qprof_dirdir	-prof_dirdir	Specifies a directory for profiling output files, .dyn and dpi.	OFF
/Qprof_filefile	-prof_filefile	Specifies a file name file for the profiling summary file.	OFF
/Qprof_format_32	-prof_format_32	Produces profile data with 32-bit counters; allows compatibility with earlier compilers. The default is to produce profile data with 64-bit counters to handle large numbers of events.	OFF
/Qprof_gen	-prof_gen	Instruments a program for profiling.	OFF
/Qprof_use	-prof_use	Enables use of profiling information during optimization.	OFF
None	-Qinstall,dir	Sets dir as a root directory for compiler installation.	OFF
/Qlocation, tool,path	-Qlocation, tool,path	Specifies an alternate version of a tool located at path.	OFF
/Qoption, tool,opts	-Qoption,tool, opts	Passes options, opts, to the tool specified by tool , which can be fpp, f, c, asm (on IA-32 systems), ias (on Itanium-based systems), or link.	OFF
None.	-qp	Compile and link for function profiling with prof(1) tool. This is the same as specifying -p or -pg.	OFF
/4R{8\|16}	-r{8\|16}	Defines the KIND for real variables in 8 and 16 bytes. -r8: Deﬁnes REAL declarations, constants, functions, and intrinsics as DOUBLE PRECISION REAL8, and deﬁnes COMPLEX declarations, constants, functions, and intrinsics as DOUBLE COMPLEX (COMPLEX16). This option is the same as specifying -real_size 64 or -autodouble. -r16: Deﬁnes REAL and DOUBLE PRECISION declarations, constants, functions, and intrinsics as REAL16, and deﬁnes COMPLEX and DOUBLE COMPLEX declarations, constants, functions, and intrinsics as COMPLEX32. This option is the same as specifying -real_size 128.	-r8
/Qrcd IA-32 only	-rcd IA-32 only	Disables the change to truncation of the rounding mode for all floating-point calculations, including floating point-to-integer conversions. This option can improve performance, but ﬂoating-point conversions to integer will not conform to Fortran semantics.	OFF
/real_size:size	-real_size size	Deﬁnes the size of REAL and COMPLEX declarations, constants, functions, and intrinsics. The size can be 32, 64, or 128.	-real_size 32
/recursive	-recursive	Speciﬁes that all routines should be compiled for possible recursive execution. This option sets the -auto option.	OFF
/reentrancy: keyword	-reentrancy keyword	Speciﬁes that the compiler should generate reentrant code that supports a multithreaded application. keyword: none, threaded, async.	OFF
/S	-S	Causes the compiler to compile to an assembly file (.s) only and not link.	OFF
/Qsafe_cray_ptr	-safe_cray_ptr	Specifies that CRAY* pointers do not alias with other variables.	OFF
/Qsave	-save	Places variables, except those declared as AUTOMATIC, in static memory (same as -noauto or -noautomatic). The default is -auto_scalar. However, if you specify -recursive or -openmp, the default is -auto.	OFF
/Qscalar_rep[-] IA-32 only	-scalar_rep[-] IA-32 only	Enables scalar replacement performed during loop transformation. To use this option,you must also specify -03.	OFF (-scalar_ rep-)
None	-shared	Tells the compiler to produce a dynamic shared object instead of an executable. On Itanium-based systems, you must specify -fpic for the compilation of each object file you want to include in the shared library.	OFF
None	-shared-libcxa	Links the Intel libcxa C++ library dynamically, overriding the default behavior when -static is used. This option is the opposite of -static-libcxa.	ON
/Qsox[-]	-sox[-] IA-32 only	Enables saving of the compiler options and version in the executable.	OFF (-sox-)
/stand:keyword	-stand keyword	Causes the compiler to issue compile-time messages for nonstandard language elements. keyword: f90, f95, none.	OFF (-nostand or -stand none)
None	-static	Prevents linking with shared libraries. Causes the executable to link all libraries statically.	OFF
None	-static-libcxa	Links the Intel libcxa C++ library statically. This option is the opposite of -shared-libcxa.	OFF
/stand:f90	-std90	Causes the compiler to issue messages for language elements that are not standard in Fortran 90 (same as the -stand f90 option).	OFF
/stand:f95	-std95 or -std	Causes the compiler to issue messages for language elements that are not standard in Fortran 95 (same as the -stand f95 option). This option is set if you specify -warn stderrors.	OFF
/Zs	-syntax_only	Speci ﬁes that the source ﬁle should be checked only for correct syntax (same as the -syntax and -y options). No code is generated, no object ﬁle is produced, and some error checking done by the optimizer is bypassed. This option lets you do a quick syntax check of your source file.	OFF
None	-T file	Tells the linker to read link commands from the specified file.	OFF
/Tffile	-Tffile	Speci ﬁes that file should be compiled as a Fortran source ﬁle. This option is useful when you have a ﬁle with a nonstandard ﬁlename sufﬁx.	OFF
/threads	-threads	Speciﬁes that multithreaded libraries should be linked. This option sets the -reentrancy threaded option.	OFF (-nothreads)
/G1 Itanium-based systems	-tpp1 Itanium-based systems	Optimizes for the Intel® Itanium® processor.	OFF
/G2 Itanium-based systems	-tpp2 Itanium-based systems	Optimizes for the Intel® Itanium® 2 processor. This is the default on Itanium-based systems.	/G2 -tpp2
/G{5\|6\|7} IA-32 only	-tpp{5\|6\|7} IA-32 only	-tpp5 optimizes for the Intel® Pentium® processor. -tpp6 optimizes for the Intel Pentium Pro, Pentium II, and Pentium III processors. -tpp7 optimizes for the Intel Pentium 4 processors, Intel® Xeon(TM) processors, Intel® Pentium® M processors, and Intel processors code-named "Prescott." This is the default on IA-32 systems.	/G7 -tpp7
/traceback	-traceback	Tells the compiler to generate extra information in the object ﬁle to allow the display of source file traceback information at runtime when a severe error occurs.	OFF
None	-tune keyword IA-32 only	Determines the version of the architecture for which the compiler generates instructions. keyword: -tune pn1 - optimizes for the Intel® Pentium® processor. -tune pn2 - optimizes for the Intel® Pentium® Pro, Intel® Pentium® II, and Inte® Pentium® III processors. -tune pn3 - optimizes for the Intel® Pentium® Pro, Intel® Pentium® II, and Intel® Pentium® III processors. This is the same as specifying the -tune pn2 option. -tune pn4 - optimizes for the Intel® Pentium® 4 processor. This is the default.	-tune pn4
/4{Y\|N}d	-u	Sets the default type of a variable to undeﬁned (IMPLICIT NONE). This is the same as specifying the -implicitnone option.	ON
/Uname	-Uname	Removes the predeﬁned macro name.	OFF
/Qunroll[n]	-unroll[n]	Sets the maximum number of times to unroll loops. Use -unroll0 to disable loop unrolling. The default is -unroll, which tells the compiler to use default heuristics.	-unroll
/Quppercase	-uppercase	Causes the compiler to ignore case differences in identiﬁers and to convert external names to uppercase (same as the -names uppercase option). The default is -lowercase (or -names lowercase).	Windows: ON Linux: OFF
None	-us	Tells the compiler to append an underscore character to external user-deﬁned names (opposite of -nus). Specifying -us is the same as specifying the -assume underscore option.
None	-use_asm	Tells the compiler to produce objects through the assembler.	OFF
/QV	-V	Displays compiler version information.	OFF
None	-v	Tells the driver that tool commands should be shown and executed.	OFF
/Qvec_report{n} IA-32 only	-vec_report{n} IA-32 only	Controls amount of vectorizer diagnostic information as follows: n = 0: no information n = 1: indicates vectorized loops (default) n = 2: indicates vectorized and non-vectorized loops n = 3: indicates vectorized and non-vectorized loops and prohibiting data dependence information n = 4: indicates non-vectorized loops n = 5: indicates non-vectorized loops and prohibiting data dependence information.	-vec_report1
/Qvms	-vms	Causes the runtime system to behave like HP* Fortran for OpenVMS Alpha systems and VAX systems (VAX FORTRAN) in various ways. See Intel® Fortran Compiler Manpages* for details.	OFF
/w	-w	Disables all warning messages (same as the -nowarn and -warn nogeneral options).	OFF
/W{0\|1}	-W{0\|1}	Disables warnings (n =0) or enables warnings (n =1). The default is -W1 (same as the -warn general option). -W0 is the same as specifying -warn nogeneral, -nowarn, or -w.	-W1
/w90, /w95	-w90, -w95	Suppresses warning messages about Fortran features which are deprecated or obsolescent in either Fortran 90 or Fortran 95.	OFF
/warn:keyword	-warn keyword	Specifies the level of warning messages issued by the compiler as indicated by a keyword: all, none, [no]alignments, [no]declarations, [no]errors, [no]general, [no]ignore_loc, [no]stderrors, [no]truncated_source, [no]uncalled, [no]unused, [no]usage. See Intel® Fortran Compiler Manpages for details.	OFF (-warn none or -warn nokeyword)
/what	-what	Prints the version strings of the Fortran command and the compiler.	OFF
/link 01[,O2]	-Wl o1 [, o2...]	Passes options -o1, -o2, etc. to the linker for processing.	OFF
/fpp:“o1[,O2]”	-Wp o1 [, o2...]	Passes options -o1, -o2, etc. to the preprocessor.	OFF
/X	-X	Removes standard directories from the include ﬁle search path (same as the -nostdinc option). You can use the -X option with the -I option to prevent the compiler from searching the default path for include ﬁles and direct it to use an alternate path.	OFF
/Qx{K\|W\|N\|B\|P} IA-32 only	-x{K\|W\|N\|B\|P} IA-32 only	Generates specialized code to run on processors supporting the extensions indicated by processor-specific codes: K - Intel® Pentium® III processors and compatible Intel processors. W - Intel Pentium 4 processors and compatible Intel processors. The new codes: when the main program is compiled with one of these options, it will detect non-compatible processors and generate a fatal error message during execution. These options also enable new optimizations in addition to Intel processor specific-optimizations. (new) N - Intel Pentium 4 processors and compatible Intel processors. (new) B - Intel® Pentium® M and compatible Intel processors. (new) P - Intel processors code-named "Prescott" and compatible Intel processors.	OFF
/link val	-Xlinker val	Pass val directly to the linker for processing.	OFF
/Zs	-y	Speciﬁes that the source ﬁle should be checked only for correct syntax (same as the -syntax_only and -syntax options).	OFF
/Qzero[-]	-zero	Initializes to zero all local scalar variables of intrinsic type INTEGER, REAL, COMPLEX, or LOGICAL, which are saved and not already initialized.	OFF (/Qzero-) (-zero-)
/Zp{1\|2\|4\|8\|16}	-Zp{1\|2\|4\|8\|16}	Aligns ﬁelds of records and components of derived types on the smaller of the size boundary specified or the boundary that will naturally align them (same as the -align recnbyte option). The n can be:1, 2, 4, 8, or 16. If you do not specify n, you get -Zp8, which is the default.	-Zp8